Eliwell IC 915 LX User Manual

DIFFERENTIAL ADJUSTMENT
DIFFERENTIAL ADJUSTMENT
For this type of adjustment, set:
•folder CnF, parameter H42=y indicating
the presence of probe Pb2;
•folder CnF, parameter H03=1 indicating
the type of adjustment (=1, adjustment
according to Pb1-Pb2 difference compared
with set point;
On the basis of these settings, the new
adjustment value is calculated according
to the difference between the values read
by the two probes “diff”=Pb1-Pb2.
If the difference is positive (Pb1> Pb2) or
negative (Pb2>Pb1) but lower or equal to
the value of the set point (SP1>”diff”, or
SP1=”diff”) the output set “for heating”
will be activated.
If the difference is positive (Pb1> Pb2) but
higher than the value of the set point
(SP1>”diff”) the output set “for cooling”
will be activated.
-->Adjustment varies according to parame-
ter H01 that determines the link between
the outputs. See diagram on right.
SETPOINT=OFFSET ADJUSTMENT
SETPOINT=OFFSET ADJUSTMENT
compared with Pb2.
compared with Pb2.
For this type of adjustment, set:
•folder CnF, parameter H42=y indicating
the presence of probe Pb2;
•folder CnF, parameter H03=2 indicating
the type of adjustment (H03=2, adjust-
ment of set point calculated as offset from
probe Pb2;
On the basis of these settings, the new
adjustment value “SE= effective set point”
is calculated according to the sum of the
set point offset (see parameter SP1) and
the value read by probe Pb2 within the
new setting limits defined by parame-
ters LLS and HLS.
The control input is always determined by
Pb1.
-->Adjustment varies according to parame-
ter H01 that determines the link between
the outputs. See diagram on right.
IC 915 LX 5/10
DIFFERENTIAL and SET POINT OFFSET ADJUSTMENT
HC1
H*
H*
-
H* maximum set point controller with differential
dF1 negative
C** minimum set point controller with differential
dF2 positive
NOTE:
•for 1 and 2 examples with HC1=H e HC2=C;
•for 3 HC1 and HC2 settings are ignored
HC2
C**
C**
-
H01
0
1
2
type of regulation
independent set points
dependent set points
Neutral Area (or window)
SP1
SP1-dF1
dF1
Off
On
SP2+dF2
SP2
dF2
Off
On
HC1=H
H01=in
HC2=C
differential adjustment
diagrams
SP1
SP1-dF1
dF1
Off
On
SP1+SP2+dF2
SP1+SP2
dF2
Off
On
HC1=H
H01=di
HC2=C
SP1-db2+dF2
SP1-db2
dF2
Off
On
SP1+db1
SP1+db1-dF1
dF1
On
OUTPUT 2
OUTPUT 1
SP1
db2
db1
independent outputs. The two
outputs regulate as though
they are completely indepen-
dent
dependent outputs. The set
point 2 SP2 regulates accord-
ing to SP1
outputs with Neutral Zone
adjustment
(or window).
NOTE: if dF1 and dF2 are both
=0 the outputs are deactivat-
ed when SP1 is reached
1
2
3
SP1
+pb2
SP1
+pb2
-dF1
dF1
Off
On
SP2
+pb2
+dF2
SP2
+pb2
dF2
Off
On
HC1=H
HC2=C
Setpoint=offset adjustment
compared with Pb2 diagrams.
SP1
+pb2
SP1+pb2
-dF1
dF1
Off
On
SP1
+pb2
+SP2
+dF2
SP1
+pb2
+SP2
dF2
Off
On
HC1=H
HC2=C
SP1
+pb2
-db2+dF2
SP1
+pb2
-db2
dF2
Off
On
SP1+pb2
+db1
SP1+pb2
+db1-dF1
dF1
On
OUTPUT 2
OUTPUT 1
SP1
+pb2
db2
db1
independent outputs. The two
outputs are adjusted as if they
were completely independent-
except for the
Pb2 analogue
input for both
dependent outputs. The set
point 2 SP2 is adjusted
according to SP1 and Pb2
outputs with Neutral Zone
adjustment
(or window).
NOTE: if dF1 and dF2 are both
=0 the outputs are deactivat-
ed when SP1 is reached
1
2
3
H01=0
H01=1
H01=2
H01=0
H01=1
H01=2

Eliwell IC 915 LX Specifications

General

Brand	Eliwell
Model	IC 915 LX
Category	Controller
Language	English